Structural roof and floor



April 16, 1929. J ATHROP 1,709,028

STRUCTURAL ROOF AND FLOOR Filed Feb. 23, 1927 INVENTOR.

ATTORNEYS Patented Apr. I1.6, 1929. I

UNITED ASTA rEsrArENT oi-Ficizp- JAY o. LATIIRQP, oi?y CINCINNATI, oriro, AssIGNon To LATIIItoP-noen GYIsuM CoN- s'rIiUCTIoN COMPANY, or CINCINNATI, oHIo, A PARTNERSHIP CoMI'osED'oI JAY C. LATHROP ANI) EDWARD CLYDE HOGE. l

' STRUCTURAL ROOF ANI) FLOOR.

Application led February 23, 1927. Serial No. 170,237.

My invention relates to structural 'roofs in particular, and has to do `with the forming of strong, light` and durable roofs for buildings, more especially flat roofedbu'ildings, with the minimum of labor on the job, the, built so far as possible of pre-l whole being pared materials, combined in a simple way to fulfill all of the necessary requisites.'

It has been the general plan of construction in the building of structural roofs in the past to proceed along one of several distinct lines. One line was to construct a metal framework for the roo-f, forming a series of hollow box-like compartments, use false work or permanent bottom boardsI of plaster, stretch or loop reinforcing fabric over the whole construction and fill same with a poured slab of cement, plaster or the like. Another line has been to use a structural framework or deck, and lay on it, in some suitable way, preformed slabs of reinforced plaster, which were molded with reinforcing wire within them. Another way has been to use removable false work for retaining the roof slab instead of plaster boards.

My presentv plan is to do neither of these things, and I depart entirely 'from reinforced f work, whether -preformed or formed on the job, and instead I employ the'box-like structure of the pouredl job, such as for example as is -shownin the patent of myp associate, Edward ClydeHoge, U. S. Patent No. 1,464,711, dated August 14, 1923. Into the series of box-like compartments I lay mein- 0 bers which rest upon the flanges of the transverse rails or beams, and are stiff enough and strong-4 enough, dependent upon the spacing roof is called upon to sustain to the rails or beams. 4I then fill in between or about the form work withpreformed light 'boards of plaster, fibrous structure, or other accepted insulating material, either preformed ord so as to leave ai substantial level'top` to the structure, and

poured as a slab or coating,

structure of the poured on the job roofs of the Hoge patent type, to supply the load sustaining element, and inbuilding u my roof deck, I use yamong other parts o the pregivenrthem, to transfer any load which the.

formed filling pieces, sheets of corrugated `metal, or other stiff and durable sheet or slab means, which will be closely enough supported due to the spacin of the framework, tov transmit the loads toi framework without the necessity of employ- 'ing any reinforced cement construction.

I accomplish my objects bythat certain construction and arrangement off arts of which an example will be specifical y illustrated and described, and the invention inherenttherein will be set forth in the claims that follow i In the drawings e supported to the said Figure 1 is a section taken across the roof structure parallel with the supporting beams. Figure 2 is a section taken at right angles to Figure 1.

Figure 3 is a perspective of a typical metal sheet as used by me.`

It willbe understood that I have illustrated only one type of construction, the essentials which constitute an example of my invention. Thus I have shown the beams 1, which beams are' set in the walls or carried on may be channels instead of I-beams, which trusses of a structure, and form the main ,support for the'roof. Across these beams I lav the transverse elements of the roof frame,`

which consists of .flanged members, such as rails 2, or angle bars set together to present the lateral base flanges as in a rail.l The. spacing of these rails is quite close, and is arranged in accordance with the strength of the filling structures.

If it is' desired to have a plaster board `under face to the roof, and this is becoming quite popular, I will'irst lay across between the rails, and resting on theUllanges thereof, the plaster boards 2*. These boards are not of sufficient strength to transfer a load from above to the rails and beams. In order to accomplish this function of the roof, I employ some stiff sheets orf plates or' boards, which should be as light in v'veight as possible. An effective device for this 'purpose is corrugated sheet metal, with` the corrugations running in the direction that the load is to be transferred. Thus if the rails are ,spaced on 24j'inchfcenters, the sheet/metal will be say 23 `inches wide, corrugated transversely to the direction of the rails, and as long as convenient. I have indicated the sheet metal at 3, and it will be convenient to loo -have the depth of the sheet metal corrugations such as'to fill the space between the rails, up to the bottom 'of the balls of the rails.

To fill in the structure up to the -tops or above the tops of the rails, thus facilitating the superimpo'sition of the usual roof to surface, AI may use pieces of preformedp aster in slabs 6,or preformed slabs `lof bagasse pulp, orthe like, the object being a filling Which will not readily dent, and which Will ll up the structure to an even top with the rails, with an additional layer above rails if required for insulation.'

l then apply tar and gravel,`layers of saturated felt and asphalt, or any other` kind of a roof top surface, as indicated generally at 4. Y l

lVhere the .plaster board is omitted beneath the sheet metal, the sheet metal will i show at the under side of the roof but in any event, the side edges of the sheet metal or other strong and light slab or strip Will rest on-the flangesof the rails, and cover the space between them. The plaster board Will usually be equipped with battens, as, at 5, Which Will be arranged to fit under corrugations of the metal, and the top layer of board can be nailed through the sheet metal into the battens. Also the sheet metal can be nailed to the battens. Also insteadv of battens, strips of the wood can be'laid across between rails and riveted or tied 1n some Way to the sheet metal to provide a body to receive nails for both -top and under surfacing.

However, in my construction there is no poured slab and reinforcement, in which the rail Webs are embedded, or which the rails serve to reinforce to any degree, although a poured plaster top to the structure may be employed Where it is desired to make it thicker. `Also, the pieces 6 may be poured instead of preformed, the latter being preferred for economy.

I relv upon a structural frame and a struetural ling with load transferring devices forming part of the filling, so as to provide a roof which is cheap to build and strong and durable in use, using the transverse met-al bars, rails or the like, to do the work of housing the filling structures, which in part are strong enough to take care of trans-- ferring such loads as are applied to the rails. When corrugated sheet metal is used with filling plates on the top and bottom, the corrugations form insulating air spaces, which is a decided advantage in my roofs.

yHaving thus described my invention, what I claim as new and desire to secure by Letters Patent, is

l. A roof .formed of main supporting beams, transverse flanged rails or the like, laid across the beams and supported thereby, said railsbeing laid to spaced centers to accommodate the functions of the filling structure, and preformed filling bodies resting upon the flanges of the rails and'forming bodies extending up to the tops 0f the rails and comprising bottom facing plates of plaster board' or the like, corrugated sheet metal having corrugations of a depth to fill the space between the rails up to the balls thereof,

prising stiff elements formed of corrugated sheet metal having inherent. strength sufficient to transfer the roof load imposed thereon to the transverse support-ing members and nhaving its corrugations extending in the direction of transference, said members being spaced With relation to the strength of said stiff elements, thus permitting said transference to take place, and an insulating bodv lmposed upon said preformed bodies and filling the spaces between said transverse members, said insulating bodies being of sufficient strength to transmit direct load to the preformed bodies, but of insufficient compressive value to serve as a reinforced slab.

JAY C. LATHROP. 

